Legally switching from 3DsMax to Blender
I have unfamiliar with the any license or Terms of Service agreement of any edition of 3DS Max, and I am not a lawyer, and don't play one on the internet. 

Having made those disclaimers, it is my understanding that the producers or Vendors of a software program do not have any legal interest in any output file (in this case a mesh) that you produce with your software. Just as Micro$oft does not have any intellectual property rights in a novel you create with their word processing software, the purveyors of 3DS Mas probably do not have any intellectual property rights in your meshes. The only exception of which I am aware to this general principle is if the file format to which you are exporting is proprietary, in which case the file format might be copyright. But even then, while the file format might be subject to copyright, that copyright applies to the file format, not the file content.

However, the format to which you expect to export, ~.obj, is an open format, and is not controlled by the purveyors of 3DS Max, so there is unlikely to be any associated licensing data.

ns